Improvement in stocks for holding screw-cutting dies



UNITED STATES PATENT OFFICE.

WM. PIMLOTT, OF SYRAOUSE, NEW YORK.

IMPROVEMENT IN STOCKS FOR HOLDING SCREW-CUTTING DIES.

Specification forming part of Letters Patent No. 50,731, dated October31, 1865.

To all whom it may concern:

Be it known that I, WILLIAM PIMLo'r'r, of the city of Syracuse, .countyot Onondaga, and State of New York, have invented certain new and usefulIm provexnents in Die-Stocks, whereby great advantages are gained intheir use in the saving ot` time and labor in changing the dies ofvariable forms and sizes; and I do hereby declare the following to be asufficiently accurate description of the same to enable any one skilledin such matters to construct and use the same, reference being made tothe accompanying drawings and letters ot' reference thereon, which forma part of my specification, in which- Figure l represents a plan of thestock with the dies in working position; Fig. 2, a partial plan andsection ofthe same, showing one-halt' of the die in working position andits relative connections with the stock. Fig. 3 shows the relativepositions ot' the die with the stock as it is being removed.

Like letters refer to like parts in all the drawings.

It may here be remarked that many devices have been produced to enablepractical mechanics to change the dies in their stocks without the lossof time or labor; butI have found in all with which I am familiar thateven though the dies be relieved from the pressure of theirbinding-screws, the cuttings or chips ol' metal which they make oftenwedge in the stock so tightly that much time is lost in their removal.

This ditticulty I have found by frequent experiments is entirelyovercome by my improvement, which consists simply in the introductionot' an eccentric guide or bearing, A, at one end ot` the die B. which,upon being` placed in the position as shown at A, Figs. l and 2, willretain the die in working position, but when turned backward, as shownat A, Fig. 3, will release the die and permit another to be introducedin its place. The guide A is held in working position bythe set-screw O,Fig. 1, which enters the hole in the end of the eccentric guide A, shownat P, Figs. 2 and 3. The dies are pressed together bythe handle H, Fig.1, beingI turned inward either by the hand or a wrench introduced at W,Fig. l. 'Ihe pin L, Fig. l, is simply introduced to prevent theset-screw O from being run back farther than is necessary.

Having thus brieiiy described nIy invention, what I claim, and desire tosecure by Letters Patent, is

The eccentric guide or bearing A, substantially as described, and forthe purposes set forth.

WILLIAM PIMLOTT.

Witnesses:

GEO. J. GARDNER., P. H. AGAN.

